patch-2.3.7 linux/arch/arm/nwfpe/extended_cpdo.c

• Lines: 277
• Date: Thu Jun 17 01:11:35 1999
• Orig file: v2.3.6/linux/arch/arm/nwfpe/extended_cpdo.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.6/linux/arch/arm/nwfpe/extended_cpdo.c linux/arch/arm/nwfpe/extended_cpdo.c
@@ -0,0 +1,276 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Corel Computer Corporation, 1998
+
+    Direct questions, comments to Scott Bambrough <scottb@corelcomputer.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "config.h"
+#include "softfloat.h"
+#include "fpopcode.h"
+#include "fpa11.h"
+
+floatx80 getExtendedConstant(unsigned int);
+
+floatx80 floatx80_exp(floatx80 Fm);
+floatx80 floatx80_ln(floatx80 Fm);
+floatx80 floatx80_sin(floatx80 rFm);
+floatx80 floatx80_cos(floatx80 rFm);
+floatx80 floatx80_arcsin(floatx80 rFm);
+floatx80 floatx80_arctan(floatx80 rFm);
+floatx80 floatx80_log(floatx80 rFm);
+floatx80 floatx80_tan(floatx80 rFm);
+floatx80 floatx80_arccos(floatx80 rFm);
+floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm);
+floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm);
+
+unsigned int ExtendedCPDO(const unsigned int opcode)
+{
+   floatx80 rFm, rFn;
+   unsigned int Fd, Fm, Fn, nRc = 1;
+
+   //fp_printk("ExtendedCPDO(0x%08x)\n",opcode);
+   
+   Fm = getFm(opcode);
+   if (CONSTANT_FM(opcode))
+   {
+     rFm = getExtendedConstant(Fm);
+   }
+   else
+   {  
+     switch (fpa11->fpreg[Fm].fType)
+     {
+        case typeSingle:
+          rFm = float32_to_floatx80(fpa11->fpreg[Fm].fValue.fSingle);
+        break;
+
+        case typeDouble:
+          rFm = float64_to_floatx80(fpa11->fpreg[Fm].fValue.fDouble);
+        break;
+        
+        case typeExtended:
+          rFm = fpa11->fpreg[Fm].fValue.fExtended;
+        break;
+        
+        default: return 0;
+     }
+   }
+   
+   if (!MONADIC_INSTRUCTION(opcode))
+   {
+      Fn = getFn(opcode);
+      switch (fpa11->fpreg[Fn].fType)
+      {
+        case typeSingle:
+          rFn = float32_to_floatx80(fpa11->fpreg[Fn].fValue.fSingle);
+        break;
+
+        case typeDouble:
+          rFn = float64_to_floatx80(fpa11->fpreg[Fn].fValue.fDouble);
+        break;
+        
+        case typeExtended:
+          rFn = fpa11->fpreg[Fn].fValue.fExtended;
+        break;
+        
+        default: return 0;
+      }
+   }
+
+   Fd = getFd(opcode);
+   switch (opcode & MASK_ARITHMETIC_OPCODE)
+   {
+      /* dyadic opcodes */
+      case ADF_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_add(rFn,rFm);
+      break;
+
+      case MUF_CODE:
+      case FML_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_mul(rFn,rFm);
+      break;
+
+      case SUF_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_sub(rFn,rFm);
+      break;
+
+      case RSF_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_sub(rFm,rFn);
+      break;
+
+      case DVF_CODE:
+      case FDV_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_div(rFn,rFm);
+      break;
+
+      case RDF_CODE:
+      case FRD_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_div(rFm,rFn);
+      break;
+
+#if 0
+      case POW_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_pow(rFn,rFm);
+      break;
+
+      case RPW_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_pow(rFm,rFn);
+      break;
+#endif
+
+      case RMF_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_rem(rFn,rFm);
+      break;
+
+#if 0
+      case POL_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_pol(rFn,rFm);
+      break;
+#endif
+
+      /* monadic opcodes */
+      case MVF_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = rFm;
+      break;
+
+      case MNF_CODE:
+         rFm.high ^= 0x8000;
+         fpa11->fpreg[Fd].fValue.fExtended = rFm;
+      break;
+
+      case ABS_CODE:
+         rFm.high &= 0x7fff;
+         fpa11->fpreg[Fd].fValue.fExtended = rFm;
+      break;
+
+      case RND_CODE:
+      case URD_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = 
+             int32_to_floatx80(floatx80_to_int32(rFm));
+      break;
+
+      case SQT_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_sqrt(rFm);
+      break;
+
+#if 0
+      case LOG_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_log(rFm);
+      break;
+
+      case LGN_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_ln(rFm);
+      break;
+
+      case EXP_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_exp(rFm);
+      break;
+
+      case SIN_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_sin(rFm);
+      break;
+
+      case COS_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_cos(rFm);
+      break;
+
+      case TAN_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_tan(rFm);
+      break;
+
+      case ASN_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_arcsin(rFm);
+      break;
+
+      case ACS_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_arccos(rFm);
+      break;
+
+      case ATN_CODE:
+         fpa11->fpreg[Fd].fValue.fExtended = floatx80_arctan(rFm);
+      break;
+#endif
+
+      case NRM_CODE:
+      break;
+      
+      default:
+      {
+        nRc = 0;
+      }
+   }
+   
+   if (0 != nRc) fpa11->fpreg[Fd].fType = typeExtended;
+   return nRc;
+}
+
+#if 0
+floatx80 floatx80_exp(floatx80 Fm)
+{
+//series
+}
+
+floatx80 floatx80_ln(floatx80 Fm)
+{
+//series
+}
+
+floatx80 floatx80_sin(floatx80 rFm)
+{
+//series
+}
+
+floatx80 floatx80_cos(floatx80 rFm)
+{
+//series
+}
+
+floatx80 floatx80_arcsin(floatx80 rFm)
+{
+//series
+}
+
+floatx80 floatx80_arctan(floatx80 rFm)
+{
+  //series
+}
+
+floatx80 floatx80_log(floatx80 rFm)
+{
+  return floatx80_div(floatx80_ln(rFm),getExtendedConstant(7));
+}
+
+floatx80 floatx80_tan(floatx80 rFm)
+{
+  return floatx80_div(floatx80_sin(rFm),floatx80_cos(rFm));
+}
+
+floatx80 floatx80_arccos(floatx80 rFm)
+{
+   //return floatx80_sub(halfPi,floatx80_arcsin(rFm));
+}
+
+floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm)
+{
+  return floatx80_exp(floatx80_mul(rFm,floatx80_ln(rFn))); 
+}
+
+floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm)
+{
+  return floatx80_arctan(floatx80_div(rFn,rFm)); 
+}
+#endif